Effects of pyrolysis temperature and reaction time on the performance of swine-manure-derived bio-binder

Abstract

Swine-manure-derived bio-binder can solve the problem of environmental pollution caused by the accumulation of solid waste from swine manure, and realize the replacement of asphalt by sustainable road construction materials. The main purpose of this study is to study the influence of pyrolysis conditions on the performance of swine-manure-derived bio-binder, the swine manure particles were cracked at 5 pyrolysis temperatures and 2 reaction times. Ten kinds of swine-manure-derived bio-oil were prepared, and 15% bio-oil were used to partially replace petroleum asphalt to prepare corresponding bio-binder. The effects of pyrolysis conditions on the penetration, softening point, ductility, water absorption and the rheological properties of bio-binder were tested. The results show that the maximum bio-oil yield of 1 s reaction time at 550 °C pyrolysis temperature was 45.1%. The high temperature stability of bio-binder is better than that of virgin asphalt. The high temperature stability of bio-binder gradually decreases with the pyrolysis temperature and reaction time of bio-oil. The fatigue performance and low-temperature crack resistance of the bio-binder are poorer than that of virgin asphalt on the low pyrolysis temperature, but those performances will be gradually improved with the pyrolysis temperature. The low-temperature crack resistance of the binder can be improved by prolonging the cracking reaction time under a certain pyrolysis temperature. Considering the yield of bio-oil and the performance of bio-binder comprehensively, the swine-manure-derived bio-oil at a pyrolysis temperature of 550 °C and a reaction time of 1 s is the most suitable for the preparation of bio-binder.